10 Ways to Burn More Calories Just By Sitting

Who needs the gym when you can do these sneaky moves and lose weight with almost no effort?

Take That Coffee Break While caffeine can be used for a metabolic boost, not all wake-up drinks are created equal, says Ross. A lot of energy boosting beverages and flavored coffees, for instance, are packed with sugar -- and if weight loss is your goal, she suggests keeping the sweet stuff under 15 grams per day. "The best caffeinated choices would be green tea, black tea, or straight black coffee -- all unsweetened," she says, suggesting you stick with two 10 to 12 ounce glasses a day, and not after 3 p.m., which could impair sleep.

Too much caffeine can have also negative effects on the body, says Ashley Koff, RD, a dietician and co-author of "Mom Energy." "Chronic caffeine use can cause burnout, and if you're not well-hydrated, caffeine can slow your metabolism." For weight loss, Koff likes oolong tea for its fat-burning/energy boosting capabilities. If your goal is to lose weight but also stay awake longer, Koff says tea is a better choice than coffee, since it also has nutrients that slow the caffeine's absorption, so you don't spike and crash.